Nil/Empty UUID Generator

Nil UUID: All bits set to zero (00000000-0000-0000-0000-000000000000). Used as an explicit "empty" or "not set" value in many systems.

00000000-0000-0000-0000-000000000000

Generate Nil/Empty UUID in Code

java

// Java
import java.util.UUID;
System.out.println(new UUID(0L, 0L));

csharp

// C#
using System;
Console.WriteLine(Guid.Empty);

php

// PHP (ramsey/uuid)
use Ramsey\Uuid\Uuid;
echo Uuid::fromString('00000000-0000-0000-0000-000000000000')->toString();

python

# Python
import uuid
print(uuid.UUID(int=0))

// C (libuuid, Linux)
#include <uuid/uuid.h>
uuid_t uuid = {0};
char str[37];
uuid_unparse_lower(uuid, str);
printf("%s\n", str);